* Finally add that missing relationship allowing a type to be assignable to both branches of a conditional
* Explicitly write out Ternary.Maybe
* Add slightly modified example from #25413
* fix sick sentence
* Loosen check to skip false branch constraint check to consider `infer` parameters as always satisfied in the extends clause
* Simplify things a bit, only instantiate once
Co-authored-by: Nathan Shively-Sanders <293473+sandersn@users.noreply.github.com>
* Fix property name bindings for class expr in loops
* Fix block-scope capturing with prop initializers
Co-authored-by: Joey Watts <joey.watts.96@gmail.com>
* Add a test for JSX namespace lookup with `jsx: preserve, jsxImportSource`
* updated baselines
Co-authored-by: Nathan Shively-Sanders <293473+sandersn@users.noreply.github.com>
This was caused by the fact that getTypeWithFacts(resultType, TypeFacts.NEUndefinedOrNull) will return never both if resultType was already never and if resultType does not contain undefined or null. In the latter case returning the declaring type is correct, in the former case this causes something narrowed to never to still be typed as the original declared type.
Fixes#38070
When the originating definition was of the form
```js
module.exports.foo = expr
```
we were incorrectly trying to call `resolveName` on just the `foo` portion to get the "local" symbol, which simply failed to resolve (or would have resolved to the wrong thing), but for this form, the local symbol is just the containing property access expression
Previously, when getting jsdoc for signatures, the services layer would
get the jsdoc tags for the base symbol of a signature if it was
present. This is fine except when the base was overloaded. In that case,
the multiple signatures of the overload would all contribute jsdoc,
which is not correct.
A more correct fix would be to resolve overloads to the base, but
the compiler doesn't have this capability and adding it or jury-rigging
it seems like it would be complex, inappropriate for a fix to ship in a
patch version.
Co-authored-by: Orta Therox <git@orta.io>
Co-authored-by: Orta Therox <git@orta.io>
* Initial implementation+first big transitions
* about 10 more
* Change baseline filename + more baselines
1. Use containing file name instead of first @Filename.
2. Switch the rest of the tests I need for @link over to baselines.
* fix lint
* Remove unused/incorrectly named fourslash baselines
* fix incorrectly updated baselines
* dedupe non-unique filenames
* Add names to marker baselines
Also rename another duped test filename.
* Fix semicolon lint
* Support go-to-definition for imports of scripts and arbitrary files
* Support go-to-definition for non-existent files
* Add missing file property
* Use `isExternalModuleNameRelative` instead of `!pathIsBareSpecifier`
* Add partial semantic test
* Combine with symbol search for non-source-file file references
* Fix and accept API baselines
* Fix useless or
* A definition is unverified if the file path was a guess, even if a source file has that path
* Add 'data' property to completion entry for better cooperation between completions and completion details
* Add doc comment
* Update API baselines
* Add server test
* Test session’s Full result
* Fix tests
* stableSort to fix server fourslash test
* Explicit verification of data parameter
* Only enable special assignability rule on string index signatures to 'any'.
* Accepted baselines.
* Added test.
* Accepted baselines.
* Renamed test files.
* Add non-erroring version of bclas'subClassThisTypeAssignable01.ts'
* Accepted baselines.
Co-authored-by: TypeScript Bot <typescriptbot@microsoft.com>
* Fix: checkAliasSymbol crash when checking for @deprecated
It's possible that we shouldn't be creating symbol with no declarations
from non-homomorphic mapped types, but for 4.2, the right fix is to make
the @deprecated-check in checkAliasSymbol ensure that
target.declarations is defined.
* Add bug number and accept baselines
* When structurally comparing similar types, check if we are already in the middle of a more general comparison of those same types
* Do the same, but with only string manipulations
* Eliminate well-known symbols in the checker: 2021 edition
* Actually update the lib text to say unique symbol, too (this is unneeded with compat code in place, but this makes goto-def make more sense)
* Add test showing mismatched symbol constructor type interop
* Add more test cases for some other related issues this fixes
* Revert computed name change
* Style comments
* When noImplicitAny is set, combine multiple contextual overloads into a single signature, rather than producing `any` and an error
* Amalgamate intersection composite signature return types as intersections, rather than the prior exclusively union behavior
* Add another example from an issue, albeit slightly modified
* Fix newlines, add test from DT
* Interior remodelling
